[Task]: Update doc to create/update/select Projects and Environments

### What needs to happen?

The design change requires a review of the documentation.

https://hop.apache.org/manual/latest/projects/projects-environments.html

### Issue Priority

Priority: 3

### Issue Component

Component: Documentation

Start by reviewing the linked Projects and Environments documentation page and identify how it differs from the unspecified design change. Done means the page accurately explains how to create, update, and select Projects and Environments, but the issue does not define the required wording or tests.

Written by the indexing model from the issue text.